Stopping and brake-applying mechanism for narrow ware looms



E. R. HOLMES Dec. 26, 1933.

STOPPING AND BRAKE APPLYING MECHANISM FOR NARROW WARE LOOMS Filed May 10, 1932 2 Sheets-Sheet 1 N LN Salient 0v Edbridg'e RHoh'nes (lttorneg Deb. 26, 1933. E R HOLMES 1,941,006

STOPPING AND BRAKE APPLYING MECHANISM FOR NARROW WARE LOOMS Filed May 10. 1932 2 Sheets-Sheet 2 I v an ol 11 WWIHIIHNIIIIHIIHH l Qnfientor @Abhdge R Hmmes (lttbrnexas Patented Dec. 26, 1933 STOPPING AND BRAKE -APPLYING MECHA' I NISM FOR NARROW WARE LOOMS Elbridge R. Holmes, W0rcester, Mass, assignor to Cromptonda Knowles Loom Works, Worcester," Mass, a corporation ofjMassachusetts Application May 1932. Serial No.610,452

*This invention relates to narrow ware looms in vwhich a plurality of shuttles are simultaneously oscillated relative to the lay on which the shuttles are supported. It is desirable that the operation of such a loom be stopped promptly whenever the normal movements of the shuttles are obstructed or prevented.

To the accomplishment of this object, my invention relates to the provision of'improved devices by which an-interruption of shuttle movement' will directly effect the stopping of the loom and the application of the brakes thereto.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claim. r

*A preferred form of the inventionis shown in the drawings, in which w t Fig. 1 is'an end view of partsof a loom em bodying my improvements;

Fig. 2 is a frontelevation of the mechanism shownin Fig. 1, and

Fig. 3 is a'persp'ective View of certain parts shown in front elevation in Fig. 2.

Referring to the drawings, I have shown portions of a narrow ware'loom including a loom side 10, a lay 11 and a crank-shaft 12 by which the lay is oscillated. A driving gear 14 and brake drum 15 are mounted on a crank-shaft 12, the brake drum being fast thereon and the driving gear being loosely mounted thereon .and being engaged therewith by suitable friction clutch mechanism, operated by a clutch lever 16 (Fig. 1) pivoted at 17 and connected to a link 18. The link 18 (Fig. 2) is connected to a lever 19 mounted on a cross shaft 20 rotatable in bearings on the loom frame 10. w c

The usual shipper rod 22 extends across the loom and is pivotally connected to an arm 23 secured to the cross shaft 20 (Fig. 1). A collar 24 is fixed on the cross shaft 20 and is provided with an offset finger 25 engaging the side of a depending arm 26 loosely mounted on the shaft 20.

The lowerend of the arm 26 is forked to re ceive a rod 27 (Fig. 2) which is rotatably mounted in fixed bearings, one of which is shown at 28.-

A coil spring 30 encircles the rod 27 and at one end abuts the hub 31 (Fig. 3) of an arm 32 secured to the rod 27. The other end of the spring 30 engages one side of the forked arm 26'and tends to turn the arm in an anti-clockwise direction, as viewed in Fig. 2.

Such movement of the arm 26, when permitted,

causes corresponding movement of the finger 25' and collar 24, with resultant anti-clockwise movement of the cross shaft 20, which movement is communicated through the arm 19 to the link 18, moving the link to'the left and releasing the driving clutch on the crank-shaft 12." t

Movement of the arm 26 by the spring 30 is ordinarily prevented by engagement of the arm 26 by the offset end of an arm '40 (Fig. 3) also secured to the shaft'27i This arm' 40 thus prevents release of the driving clutch until'the shaft "27 is turned angularly by mechanism to be described so as to bring the arm'40 out of alignment with the arm 26.

A brake-band 42 (Figs. 1' and 2) partia1ly encircles the brake drum 15 and is anchored at one I end toa bracket 43 (Fig.1) on theloom frame 10.

The other end of the'brake-band 42 has a slot for opening to receive a stud 44, projecting upward from a short arm '45on' a "bell crank lever 46.

The lever 4 6 is mounted on a fixed pivot stud 47 and is yieldingly movable to tighten'the brakebell crank 46, whereupon. the brake-band 42 is tightened about the brake-drum l5 bythe action of the tension spring 48.

The mechanism for effecting an angular movement of the shaft 27 is substantially the same as that shown in my'prior Patent No. 1,811,432, issued June 23, 1931. 7

Briefly described, this mechanism comprises a crank arm 60 (Fig. 1) mounted on a shaft 61 supported in fixed bearings and continuously rotated through bevel gears 62 from the cam or bottom shaft 63 of the loom, which shaft rotates in a definite speed relation to the crank-shaft 12. A crank-pin 65 on the crank arm 60 traverses atransverse slotted guideway 66 supported on a diamond-shaped frame 67 (Fig. 2). The. frame 6'7 is provided with bearing portions 68 slidable on a fixed shaft 69. A guide block '70 on the frame 67 cooperates with a fixed guidebar '71 (Fig. 1) to prevent angular movement of the frame 67 relative to the shaft 69 and the crank arm 60.

A rod 73 (Fig.2) extends alongside the frame lit 6'7 and is connected at its ends by chains 74 to sprockets '75 rotatable on studs 76, which studs are supported on brackets '77 formed at the outer ends of the hubs 78 of the end swords '79 which support the lay 11. A larger sprocket 80 is rotatable with each small sprocket 75 and. communicates motion to a chain 82 through which the shuttles are oscillated by connections not shown.

A recessed block 84 (Fig. 2)v is inserted between the ends of the rods '73 and is engaged by driving members 85, the lower endsof which are seated in a recess 86 in the upper end'of the guide block 70.

A cross slide 90 is mounted in guideways' 91 on the frame 67 and engages the recessed block 84 at its lower end. A plunger 92 extends upward from the cross slide 90 through .a bearing in an offset ledge or flange 93 on the frame67, and at its upper end engages a cross rod95 sup- .ported at one end in the arm 32 (Fig. 3) previously described and at the opposite end in a similar arm 96 (Fig. 2) also fixed to the shaft .27.- A coil spring 99 encircles the plunger 92 and yieldingly forces the slide. 90 and recessed block 84 downward against the driving members 85.

Fora more complete description of the details .of construction of the driving mechanism, reference is made to-my prior patent above identified.

Having described my improved loom-stopping .and brake-applying mechanism, the operation thereof is as follows:

During the normal operation of the loom, the bevel gear shaft 61 (Fig. 1) is continuously rotated and the diamond-shaped frame 67 (Fig. 2) is moved back and forth along the fixed shaft 69 and guide bar 71 by the crank-arm 60 and crank-pin 65. This reciprocating movement of the frame 67 is communicated to the rod 73 and chains 7f and 82 by the driving members and the recessed block 84. In the meantime, .the clutch is held in driving engagement by themterruption of the oscillating movements of the gagement of the offset arm 40 with the forked arm 26, and the brake is held in non-operative position by the hook arm 51.

If the oscillating movement of any shuttle is interfered with, the rod '73 will be held stationary while the frame 67 continues to reciprocate. This will cause one or the other of the driving members 85 to be swung upward about its pivoted lower end, thus lifting the block 84 and moving the slide and plunger 92 correspond 85 'ingly upward.

shuttles will immediately and automatically effect release of the clutch and prompt application f the brakes, thereby bringing the loom to rest without delay. V

Having thus described my invention and the 109 advantages thereof, I do not wish to belimited to the details herein disclosed, otherwise than as set forthin the claim, but what I claim is:

In a narrow ware loom,- shuttle actuating mechanism including a sliding. member, an elongated connecting element positioned alongside said sliding member, a give-way driving connection between said member and said elongated element, a driving clutch, a brake,-means to render said clutchoperative, a hook arm holding 11o said brake inoperative, a spring to apply said .brake when thehook arm is removed, and means m en are 

